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Optimization of Extraction Process for Total Flavonoids from Penthorum chinense Pursh and Comparison of Their Contents from Different Parts
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作者 Hongsheng LIU Jiqiang YAO +2 位作者 Xue BAI Jianying KANG Yefei YUAN 《Medicinal Plant》 2024年第2期10-14,共5页
[Objectives]This study was conducted to optimize the extraction process of total flavonoids from Penthorum chinense Pursh and compare their contents from different parts.[Methods]Single factor and orthogonal experimen... [Objectives]This study was conducted to optimize the extraction process of total flavonoids from Penthorum chinense Pursh and compare their contents from different parts.[Methods]Single factor and orthogonal experiments were designed to optimize the extraction process of total flavonoids from P.chinense Pursh with the volume fraction of ethanol,the ratio of material to liquid,heating reflux extraction time and extraction times as factors,and the content of total flavonoids as the index.A verification test was carried out.The optimized extraction process was adopted to compare the contents of total flavonoids from different parts of P.chinense Pursh.[Results]The best extraction process was extracting the powder of P.chinense Pursh for 2.0 h with 20 times of 55%ethanol by reflux twice.Under this condition,the contents of total flavonoids were 3.63%,8.90%,11.28%,and 4.36%from stems,leaves,flowers and whole grass of P.chinense Pursh,respectively.[Conclusions]The process is reasonable,feasible and stable,and can effectively extract total flavonoids from P.chinense Pursh.The contents of total flavonoids from different parts of P.chinense Pursh were quite different,and the value was higher in the leaves and flowers,so the proportions of leaves and flowers should be paid attention to in the industrial processing of P.chinense Pursh. 展开更多
关键词 Penthorum chinense Pursh Total flavonoids Orthogonal experiments extraction process Content determination
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Optimization of Polysaccharides Extraction from Physalis alkekengi L.Peel and Its Effect on the Expression of Inflammation-Related Proteins in SW620 Cells
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作者 Dan Shao Chengxin Hao +4 位作者 Yubi Mei Jiaxin Xu Tianjiao Wang Wei Yang Jiamei Wu 《Proceedings of Anticancer Research》 2024年第4期148-156,共9页
Objective:To establish an optimized aqueous extraction process for polysaccharides from Physalis alkekengi L.peel and to preliminarily explore its in vitro anti-inflammatory activity against colorectal cancer SW620 ce... Objective:To establish an optimized aqueous extraction process for polysaccharides from Physalis alkekengi L.peel and to preliminarily explore its in vitro anti-inflammatory activity against colorectal cancer SW620 cells.Methods:A single-factor test combined with orthogonal test analysis was used to evaluate the effects of the material-to-liquid ratio,extraction temperature,and extraction time on the yield of polysaccharides from Physalis alkekengi L.peel.The antioxidant activity of the polysaccharides was assessed by analyzing their free radical scavenging ability in vitro,and the anti-inflammatory effect was evaluated using SW620 cells.Results:The optimal extraction conditions were a material-to-liquid ratio of m(g):V(mL)=1:30,an extraction temperature of 100℃,and an extraction time of 40 minutes,with a predicted polysaccharide yield of 25.7%.The polysaccharides from Physalis peruviana peel effectively scavenged DPPH,superoxide anion,and hydroxyl radicals.After treatment with Physalis peruviana polysaccharides,the levels of IL-1β,IL-18,and TNF-αin the cell culture medium were significantly reduced,and the phosphorylation level of P65 protein in SW620 cells was decreased.Conclusion:This extraction method is stable and reliable,and the prepared Physalis alkekengi L.polysaccharides exhibit significant in vitro antioxidant and anti-inflammatory activities.This study provides a theoretical basis for developing drugs for the prevention and treatment of colorectal cancer. 展开更多
关键词 Physalis alkekengi L.polysaccharide ANTIOXIDANT IL-1β extraction process Colorectal cancer
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Extraction Process and Quality Standard of Danshen Jianxin Capsules 被引量:1
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作者 Chengtong LIU Xinying MO +5 位作者 Silu HE Donglian CHEN Guilin YANG Hongsheng TAN Peng LIANG Haisheng ZENG 《Medicinal Plant》 CAS 2023年第1期25-28,共4页
[Objectives]This study was conducted to establish the quality standard of Danshen Jianxin Capsules.[Methods]Orthogonal design was adopted to optimize the water extraction process by taking the amount of water added,ex... [Objectives]This study was conducted to establish the quality standard of Danshen Jianxin Capsules.[Methods]Orthogonal design was adopted to optimize the water extraction process by taking the amount of water added,extraction time and extraction times as factors,and the content of tanshinone I as the index.Salviae Miltiorrhizae,Notoginseng Radix Et Rhizoma and Radix Astragali in the capsules were qualitatively identified by TLC,and the content of tanshinone I in the capsules was determined by HPLC.[Results]The best water extraction process included the steps of adding 12 times of water each time,extracting the materials twice,for 1 h each time.In TLC identification,the test samples showed spots of the same color at the positions corresponding to tanshinone II A,ginsenoside Rg1,notoginsenoside R1 and astragaloside IV reference samples.[Conclusions]Danshen Jianxin Capsules was prepared by the water extraction method,which is characterized by high efficiency and being suitable for mass production.The quality control method is reliable,fast and accurate,which can effectively control the quality of the product. 展开更多
关键词 Danshen Jianxin Capsules extraction process Content determination TLC identification Quality standard
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Optimization of Compound Coptis Ointment Extraction through the Integration of Pharmacodynamic Indices and Orthogonal Test
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作者 Jin ZHOU Xiuli ZHOU +3 位作者 Yu ZHOU Ming MEI Qiang GAO Xinguo LIU 《Medicinal Plant》 CAS 2023年第5期32-35,共4页
[Objectives]To determine the optimal reflux extraction process conditions for Compound Coptis Ointment.[Methods]The study employed the orthogonal experimental design method and drug-sensitive disc agar diffusion metho... [Objectives]To determine the optimal reflux extraction process conditions for Compound Coptis Ointment.[Methods]The study employed the orthogonal experimental design method and drug-sensitive disc agar diffusion method to evaluate the extraction rate,berberine hydrochloride content,and bacteriostatic ring diameter of the extract as comprehensive indices,and optimized the extraction process conditions of Compound Coptis Ointment using ethanol reflux.[Results]Based on the results of comprehensive indices,the optimal reflux extraction conditions for Compound Coptis Ointment were determined to be soaking in 1.5 times the amount of 70%ethanol for 2 h,followed by two extractions with 6 times the amount of 70%ethanol for 1 h each time.Three verification tests were conducted under the optimal process conditions.The yield of the extract was 28.32%±0.53%,the content of berberine hydrochloride was 4.68%±0.45%,and the diameter of the bacteriostatic ring was(2.5±0.2)cm.[Conclusions]The extract had higher drug content and exhibited better antibacterial effects.The optimized extraction process is simple,stable,and reliable,and can be effectively used to optimize the extraction process of Compound Coptis Ointment. 展开更多
关键词 Compound Coptis Ointment Orthogonal test Antibacterial test extraction process
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Extraction Process of Zhuang Medicine Fumigation Lotion
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作者 Jiangcun WEI Meiyan QIU +4 位作者 Bing QING Xianyi SHI Yinghong HUANG Xian PENG Wen ZHONG 《Medicinal Plant》 CAS 2023年第5期29-31,41,共4页
[Objectives]To establish the extraction process and quality standard method of Zhuang medicine fumigation lotion.[Methods]The orthogonal design method was employed to optimize the water extraction process with the amo... [Objectives]To establish the extraction process and quality standard method of Zhuang medicine fumigation lotion.[Methods]The orthogonal design method was employed to optimize the water extraction process with the amount of water added,decocting time and extraction times as factors,and syringin content and dry extract yield as indexes.The content of syringin was determined by high performance liquid chromatography.[Results]The best water extraction process was:soaking in water for 1 h,decocting twice,added 10 times the amount of water each time,decocting for 1 h.The average content of syringin in 3 batches was 0.98 mg/g,and the average dry extract yield was 26.07%.[Conclusions]The project adopts water extraction method to prepare Zhuang medicine fumigation lotion,which has the characteristics of high efficiency and suitable for large-scale production.The quality control method is reliable,rapid and accurate,and can effectively control the quality of the lotion. 展开更多
关键词 Zhuang medicine fumigation lotion extraction process Content determination
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Optimization of extraction of polyphenols from pomegranate peel by orthogonal experiment design and antioxidant activity
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作者 Hanxin Zhang Junan Zhen +2 位作者 Jiajun Yin Caihong Shi Xiangrong Zhang 《Journal of Polyphenols》 2023年第2期51-59,共9页
The aim of this study was to investigate the extraction process and antioxidant activity of polyphenols from Yunnan Mengzi pomegranate peel.Single factor and orthogonal test were used as optimize the extract rate(ER)o... The aim of this study was to investigate the extraction process and antioxidant activity of polyphenols from Yunnan Mengzi pomegranate peel.Single factor and orthogonal test were used as optimize the extract rate(ER)of polyphenols from pomegranate peel(PGP).The polyphenols antioxidant activity was evaluated by DPPH·,·OH and total reducing ability,and compared with that of Vc.The optimum extraction conditions of polyphenols were as follows:ethanol concentration of 50%,liquid-solid ratio of 50:1,extraction temperature of 90°C,extraction for 4 h.Under these conditions,the ER of polyphenols from GPG was 8.15%.The results showed that the scavenging effects of polyphenols and Vc on DPPH·,·OH increased with increasing concentration,and the scavenging effect of polyphenols on DPPH·was higher than Vc in rang of 0.1-1.6µg/mL.When the concentration is greater than 0.6µg/mL,the scavenging effects of plyphenols on·OH is higher than Vc.The total reducing ability of polyphenols from PGP improved with the increase of concentration,and when the concentration was 8µg/mL,the total reducing ability was 114 U/mL. 展开更多
关键词 pomeranate peel total polyphenols extraction process orthogonal experiment antioxidant activity
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Biodiesel Production from Rhynchophorus ferrugineus Larvae Oil: Physichochemical Properties and Acid Composition of Oil as Affected by Oil Extraction Protocol
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作者 Arnaude Folepe Azemo Esther Julius K. Tangka Nsah-ko Tchoumboue 《Journal of Sustainable Bioenergy Systems》 2023年第4期117-130,共14页
Biodiesel, a renewable energy source made from natural oils and fats, can be produced using white raffia larvae as a raw material. These larvae have a high lipid content and a short life cycle, making them suitable fo... Biodiesel, a renewable energy source made from natural oils and fats, can be produced using white raffia larvae as a raw material. These larvae have a high lipid content and a short life cycle, making them suitable for this purpose. One crucial step in biodiesel production is oil extraction, and this study aimed to investigate how the extraction protocol affects the fuel properties of the oil. To study the impact of solvent type, solvent volume, and residence time on oil yield, 200 grams of Rhynchophorus ferrugineus were used in a Soxhlet extractor. The researchers examined the physicochemical properties and fatty acid composition of the crude grease using the European biodiesel standard (EN14214) and gas chromatography methods, respectively. The study found that hexane as a solvent produced the highest oil yield (64.44%) during a four-hour extraction period with a solvent ratio of 300 ml. Furthermore, the hexane-extracted oil had the highest iodine number (3.02 g/100 g) and cetane number (55.69). These values indicate favorable properties for biodiesel production. The Rhynchophorus ferrugineus larvae oil proved to be a rich source of monounsaturated fatty acids (76%), which were found to be significantly affected by the solvent type. Based on quality assessment, Rhynchophorus ferrugineus can be suitable for biodiesel production. In summary, under the given operational conditions, hexane is the most suitable solvent for Rhynchophorus ferrugineus oil extraction for biodiesel production. Further research in optimizing the extraction process can contribute to the efficient utilization of renewable energy sources like white raffia larvae for biodiesel production. 展开更多
关键词 BIODIESEL extraction Process Fatty Acid Composition Physico-Chemical Properties Rhynchophorus ferrugineus Larvae
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Removal of chromium(Ⅲ) from aqueous waste solution by predispersed solvent extraction 被引量:1
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作者 罗建洪 李军 +1 位作者 杨兆鹏 刘雪峰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第2期524-529,共6页
The extraction experiments of chromium(W) from aqueous waste solution by predispersed solvent extraction (PDSE) process with extractant (HEHPEHE) and its mixture, including acidic extractant (D2EHPA), alkaline... The extraction experiments of chromium(W) from aqueous waste solution by predispersed solvent extraction (PDSE) process with extractant (HEHPEHE) and its mixture, including acidic extractant (D2EHPA), alkaline extractant (TOA) and neutral extractant (TBP) were carried out respectively. It is found that the extractant HEHPEHE exhibited high extraction selectivity to chromium(III) from aqueous waste solution. The colloidal liquid aphrons (CLAs) were successfully generated using kerosene as a solvent, HEHPEHE as an extractant, sodium dodecyl benzene sulphate (SDBS) as a surfactant in aqueous phase and polyoxyethylene sorbitol anhydride monolaurate (Tween-20) in oil phase. To study the extraction efficiency and advantages of the PDSE process in the removal of chromium(III), the effects of major factors, such as initial chromium(III) concentration, volume of colloidal gas aphrons (CGAs), HEHPEHE volume fraction, phase ratio (solvent phase to water phase), mass fraction of dodecyl trimethylammonium bromide (HTAB), mass fraction of SDBS, mass fraction of Tween-20 and initial pH of aqueous waste solution were also investigated and the appropriate process conditions were obtained. Under the appropriate conditions, the extraction efficiency of chromium(III) above 99.9 % can be achieved and the treated aqueous waste solution can be discharged directly without polluting the environment. 展开更多
关键词 predispersed solvent extraction (PDSE) process chromium(III) extraction mechanism EXTRACTANT
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Study on Extraction Process of Phytoene from Tomato Paste
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作者 吴增宝 彭代萍 陈文 《Agricultural Science & Technology》 CAS 2017年第12期2554-2556,2560,共4页
With tomato paste as raw material, the optimal extraction process of phy- toene from tomato paste was explored by orthogonal experiment on the basis of single-factor experiments. The results showed that the optimal ex... With tomato paste as raw material, the optimal extraction process of phy- toene from tomato paste was explored by orthogonal experiment on the basis of single-factor experiments. The results showed that the optimal extraction process for phytoene from tomato paste was as follows: extractant, acetone; solid to liquid ratio, 10:1; extraction time, 40 min; extraction temperature, 45 ℃. The developed extrac- tion process was stable, reasonable and feasible. Under the optimal extraction pro- cess, the extraction rate of phytoene reached 0.044 4%. 展开更多
关键词 Tomato paste PHYTOENE extraction process
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Optimization of Ethanol-Ultrasound-Assisted Destabilization of a Cream Recovered from Enzymatic Extraction of Soybean Oil 被引量:1
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作者 Li Yang Sui Xiaonan +5 位作者 Qi Baokun Zhang Yan Feng Hongxia Zhang Yana Jiang Lianzhou Wang Tong 《大豆科技》 2019年第S01期24-34,共11页
A novel method using ethanol and ultrasound to extract oil from cream obtained from enzyme-assisted aqueous extraction of soybean oil was developed.To evaluate the relationships between operating variables and free oi... A novel method using ethanol and ultrasound to extract oil from cream obtained from enzyme-assisted aqueous extraction of soybean oil was developed.To evaluate the relationships between operating variables and free oil yield and to maximize the free oil yield,response surface methodology was introduced in this work.The developed regression model was fitted with R2=0.9591.Optimized variables were:ethanol concentration of73%,ethanol addition volume of 0.55 L/kg,ultrasound power of 427 W,ultrasound time of 47 s,and ultrasound temperature of 53℃.The free oil yield from the cream under the above conditions was 92.6±3.4%.Scanning electron microscopy(SEM)was used to evaluate the effect of ultrasonic treatment on ethanoltreated cream,and the SEM images clearly showed that the ultrasound treatment affected dispersing and fracturing of the microstructure of ethanol-treated cream. 展开更多
关键词 ETHANOL ULTRASOUND Enzyme-assisted aqueous extraction processing CREAM Soybean oil
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Extraction optimization of insecticidal compounds from Lysurus mokusin by response surface methodology 被引量:2
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作者 Liannan Lin Jing Yang +4 位作者 Guocai Zhang Xiaobo Zhang Chuanshan Zou Tingyu Wang Jianyong Zeng 《Journal of Forestry Research》 SCIE CAS CSCD 2020年第5期1985-1993,共9页
We optimized the extraction process of Lysurus mokusin(L.)Fr.insecticidal compound(LMIC)using response surface methodology with ultrasonic extraction(UE).The surface morphologies of maceration extract(ME)and UE residu... We optimized the extraction process of Lysurus mokusin(L.)Fr.insecticidal compound(LMIC)using response surface methodology with ultrasonic extraction(UE).The surface morphologies of maceration extract(ME)and UE residues were compared by scanning electron microscopy,and then the activity of LMIC on Lymantria dispar(Asian gypsy moths)larvae was determined.Results showed that the optimal condition of UE was followed by 80 min of extraction time,60%of ethanol concentration and 80 mL g^-1 of liquid–solid ratio.The surface morphologies of UE residue were looser and rougher than ME residue.The corrected mortalities of LMIC on L.dispar larvae was 59.77%.This result indicated that L.mokusin was a good candidate as pesticide for pest management. 展开更多
关键词 Lysurus mokusin Gypsy moth Response surface extraction process Toxicity test
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Investigation of extraction fraction in confined impinging jet reactors for tri-butyl-phosphate extracting butyric acid process 被引量:2
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作者 Zhengming Gao Manting Zhao +2 位作者 Yun Yu Zhipeng Li Jing Han 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第2期310-316,共7页
The extraction fraction E and overall volumetric mass transfer coefficient kka of TBP extracting butyric acid pro- cess in confined impinging jet reactors (CIJR) with two jets were investigated. The main variables t... The extraction fraction E and overall volumetric mass transfer coefficient kka of TBP extracting butyric acid pro- cess in confined impinging jet reactors (CIJR) with two jets were investigated. The main variables tested were the concentration of tri-butyl-phosphate (TBP) and butyric acid, the impinging velocity V, the impinging velocityratio of two phases Vorg/Vaq, the nozzle inner diameter di and the distance L between the jet axes and the top wall of the impinging chamber. The results showed that E and kLa increase with an increase of the impinging velocity V, the concentration ofTBP Corg, and the impinging velocity ratio Vor/Vaq. However, E and kta decrease with an increase of the inner diameter d1 from 1 to 2 mm, the concentration of butyric acid Caq from 0.5% (v/v) to 2% (v/v). The factor L ranging from 3 to 11 mm has a negligible effect on E and kLa. A correlation on these variables and kLa was proposed based on the experimental data. These results indicated good mass transfer oerformance of CIJR in the extraction operation. 展开更多
关键词 Confined impinging jet reactors (CIJR) extraction fraction Mass transfer coefficient extraction process
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Optimization of Extraction Process of Clerodendrum philippinum Schauer var. simplex Mlodenke Total Flavonoids(CPTF) by Central Composite Design-Response Surface Methodology 被引量:3
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作者 Bo LI Simao HUANG +3 位作者 Xiaohua PANG Boting XI Houkang CAO Kefeng ZHANG 《Medicinal Plant》 CAS 2018年第3期17-20,共4页
[Objectives] The research aimed to optimize extraction process of Clerodendrum philippinum Schauer var. simplex Mlodenke total flavonoids( CPTF),and provide reference for its development and utilization. [Methods] Bas... [Objectives] The research aimed to optimize extraction process of Clerodendrum philippinum Schauer var. simplex Mlodenke total flavonoids( CPTF),and provide reference for its development and utilization. [Methods] Based on single-factor test,ethanol concentration,extraction temperature and extraction time were taken as independent variables,and total flavonoids yield was taken as dependent variable. The test was conducted according to central composite design principle. Multivariate linear regression and binomial equation fitting of the result were conducted,and extraction process of CPTF was optimized by using response surface methodology. [Results]The optimal extraction process of CPTF was as below: ethanol concentration 54. 76%,extraction temperature 83. 92℃,extraction time 102. 64 min,solid-liquid ratio 1:20,extraction for twice. [Conclusions] The extraction process of CPTF by central composite design-response surface methodology was simple and feasible,with reliable prediction result,which was suitable for industrial production. 展开更多
关键词 Central composite design-response surface methodology Guoqiangfeng Total flavonoids extraction process
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Optimization of Ultrasonic-enzymatic Extraction of Total Flavonoids from Cardamine tangutorum O.E.Schulz by Response Surface Methodology and Content Determination 被引量:2
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作者 Xiaoxia CAI Bochao LI +3 位作者 Xuexue LI Hongna SU Wenbing LI Yuan LIU 《Medicinal Plant》 CAS 2020年第6期36-41,共6页
[Objectives]This study aimed to optimize the extraction process of total flavonoids in Cardamine tangutorum O.E.Schulz.[Methods]On the basis of single-factor experiments,the ultrasonic-enzymatic extraction process of ... [Objectives]This study aimed to optimize the extraction process of total flavonoids in Cardamine tangutorum O.E.Schulz.[Methods]On the basis of single-factor experiments,the ultrasonic-enzymatic extraction process of total flavonoids in C.tangutorum O.E.Schulz was optimized by Box-Behnken design from aspects of ethanol volume fraction,extraction time,extraction temperature and enzyme addition,with yield of total flavonoids as the evaluation index.[Results]The optimal extraction process of total flavonoids in C.tangutorum O.E.Schulz was as follows:ethanol volume fraction of 70%,ultrasonic extraction time of 43 min,ultrasonic extraction temperature of 37℃and cellulose addition of 0.07 mg.Under the optimal conditions,the yield of total flavonoids from C.tangutorum O.E.Schulz reached 75.90 mg/g.[Conclusions]The optimized extraction process was reasonable and feasible,and it could provide a reference for the extraction of total flavonoids in C.tangutorum O.E.Schulz.This study provided a foundation for the quality control of food/medicinal materials and the development and research of big health products of C.tangutorum O.E.Schulz. 展开更多
关键词 Cardamine tangutorum O.E.Schulz Total flavonoid Response surface methodology Ultrasonic-enzymatic hydrolysis extraction process
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Optimization of the Extraction Process of Astaxanthin from Haematococcus pluvialis with Oil Dissolution Method 被引量:2
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作者 Xiaohui LI Ning ZOU +1 位作者 Donghong SUN Jun ZHANG 《Agricultural Biotechnology》 CAS 2015年第6期70-72,共3页
[ Objective ] This study aimed to optimize the extraction process of astaxanthin from Haematococcus pluvialis with oil dissolution method. [ Method ] Small amounts of acetone or ethanol were separately added into soyb... [ Objective ] This study aimed to optimize the extraction process of astaxanthin from Haematococcus pluvialis with oil dissolution method. [ Method ] Small amounts of acetone or ethanol were separately added into soybean oil for astaxanthin extraction. The extraction efficiency of astaxanthin from H. pluvialis with different methods was compared. [ Result] The extraction efficiency of astaxanthin from H. pluvialis with acetone, acetone + soybean oil, ethanol + soybean oil, soybean oil was 20.46, 21.65, 20.85 mg/g and 13.05 mg/g, respectively. According to the results, acetone + soybean oil led to the highest extraction rate, which was approximately twice that of soybean oil and higher than that of acetone. [ Conclusion ] This study laid the foundation for large-scale production of astaxanthin. 展开更多
关键词 Haematococcus pluvialis extraction process optimization ASTAXANTHIN 0il dissolution method
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Research Progress of Value, Extraction and Applicationof Silkworm Chrysalis Protein 被引量:2
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作者 zhang yuping zhang lili +5 位作者 chen ming dai junjun wu chuanhua liu jian fan tao yin jianli 《Animal Husbandry and Feed Science》 CAS 2018年第4期241-245,共5页
Silkworm chrysalis protein is a high quality pure natural complete animal protein with high utilization value, and it has been widely usedin many industries in recent years. The nutrition, health care and medicinal va... Silkworm chrysalis protein is a high quality pure natural complete animal protein with high utilization value, and it has been widely usedin many industries in recent years. The nutrition, health care and medicinal value of silkworm chrysalis protein, the degreasing, deodorization anddecoloration extraction process, and its application in food, medicine, feed, etc. are summarized, in order to provide the reference for further development and industrial production of silkworm chrysalis protein. 展开更多
关键词 Silkworm chrysalis protein Bioactive substances extraction process Comprehensive utilization Research progress
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A novel hydrothermal method for zinc extraction and separation from zinc ferrite and electric arc furnace dust 被引量:5
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作者 Hui-gang Wang Yang Li +2 位作者 Jian-ming Gao Mei Zhang Min Guo 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2016年第2期146-155,共10页
A novel hydrothermal process was developed to extract zinc from pure zinc ferrite(ZnFe2O4) nanopowder and zinc-containing electric arc furnace(EAF) dust using hexahydrated ferric chloride(FeCl3-6H2O) as a decomp... A novel hydrothermal process was developed to extract zinc from pure zinc ferrite(ZnFe2O4) nanopowder and zinc-containing electric arc furnace(EAF) dust using hexahydrated ferric chloride(FeCl3-6H2O) as a decomposing agent.The effects of solid FeCl3-6H2O to ZnFe2O4 ratio by mass(RF/Z),hydrothermal reaction temperature,and time on zinc extraction were systematically investigated.In the results,when the hydrothermal reaction is conducted at 150℃ for 2 h with RF/Z of 15:20,the efficiency of zinc extraction from ZnFe2O4 reaches97.2%,and the concentration of ferric ions(Fe^3+) in the leaching solution is nearly zero,indicating a high selectivity for zinc.In addition,the zinc extraction efficiency from the EAF dust reaches 94.5%in the case of the hydrothermal reaction performed at 200℃ for 10 h with the solid FeCl3-6H2O to EAF dust ratio by mass(RF/EAF dust) of 15:10.Zinc and iron separation is achieved by adjusting the pH value of the leaching solution according to the different precipitation pH values of metal hydroxides. 展开更多
关键词 electric arc furnaces dust zinc extraction separation hydrothermal process
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Comparative Study on the Different Extraction Processes of Dietary Fiber from Sweet Potato 被引量:4
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作者 QUAN Gui-jing GENG Da-wei 《Chinese Food Science》 2012年第3期5-8,共4页
[Objective] To compare the extraction results of several different methods. [Method] The dietary fiber was extracted from sweet potato respectively by the sieve method, the enzymatic process and enzyme-alkali method. ... [Objective] To compare the extraction results of several different methods. [Method] The dietary fiber was extracted from sweet potato respectively by the sieve method, the enzymatic process and enzyme-alkali method. The extraction results of the three methods were optimized and compared. [Result] The extraction rate of dietary fiber by enzymatic method was the highest, which could reach 38% of total potato residue. The properties of dietary fiber extracted by the three methods were compared, the results indicated that the dietary fiber extracted by enzymatic method had good water-holding capacity, soil absorption and expansion. [Conclusion] The enzymatic method is the best for extracting dietary fiber from sweet potato. 展开更多
关键词 Dietary fiber Sweet potato extraction process CHARACTERISTICS China
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Feature extraction of wood-hole defects using wavelet-based ultrasonic testing 被引量:7
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作者 Huiming Yang Lei Yu 《Journal of Forestry Research》 SCIE CAS CSCD 2017年第2期395-402,共8页
The primary bottleneck to extracting wood defects during ultrasonic testing is the accuracy of identifying the wood defects. The wavelet energy moment was used to extract defect features of artificial wood holes drill... The primary bottleneck to extracting wood defects during ultrasonic testing is the accuracy of identifying the wood defects. The wavelet energy moment was used to extract defect features of artificial wood holes drilled into 120 elm samples that differed in the number of holes to verify the validity of the method. Wavelet energy moment can reflect the distribution of energy along the time axis and the amount of energy in each frequency band,which can effectively extract the energy distribution characteristics of signals in each frequency band; therefore,wavelet energy moment can replace the wavelet frequency band energy and constitute wood defect feature vectors. A principal component analysis was used to normalize and reduce the dimension of the feature vectors. A total of 16 principal component features were then obtained, which can effectively extract the defect features of the different number of holes in the elm samples. 展开更多
关键词 wavelet defects ultrasonic extracting replace validity identifying verify processed bottleneck
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Optimization of Quality Control Method and Ethanol Extraction Process of Psoralen and Bergapten in Ficus pandurata 被引量:1
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作者 Weiwen PENG Chang CHEN +2 位作者 Weibo DAI Yangcun LU Yingjing WANG 《Medicinal Plant》 CAS 2020年第3期51-54,59,共5页
[Objectives]To establish a qualitative identification and content determination method for psoralen and bergapten in the roots and leaves of Ficus pandurata,and the multi-indicator scoring method to optimize the ethan... [Objectives]To establish a qualitative identification and content determination method for psoralen and bergapten in the roots and leaves of Ficus pandurata,and the multi-indicator scoring method to optimize the ethanol extraction process for the effective parts of F.pandurata.[Methods]Qualitative identification was carried out by thin-layer chromatography(TLC)and content determination was made by high-performance liquid chromatography(HPLC);the content of psoralen and bergapten and extract yield were used as indicators,to investigate the effects of ethanol volume fraction,solid-to-liquid ratio,extraction time and extraction times on the ethanol extraction process of F.pandurata;multi-indicator scoring method was adopted,orthogonal test method was designed to optimize the extraction process,and verification test was performed.[Results]TLC chart of F.pandurata shows clear spots and good separation;the detected concentrations of psoralen and bergapten in the roots are in the range of 1.02-32.64μg/mL and shows a good linear relationship with the peak area(r=0.9997);these components have not been detected in the leaves,and the precision,RSD of stability and repeatability test is less than 2%;the average recovery rate was 99.8%-100.2%,and the RSD value is 1.12%-1.13%(n=6);the optimized extraction process is to use 50%ethanol as the extraction solvent,the solid-to-liquid ratio of 1∶10,reflux extraction of 3 times,and 1.5 h each time;the results of the three batches of verification tests show that the content of the two indicator components obtained is high,and the average value of the total amount is 0.34 mg/g(RSD=0.30%,n=3).[Conclusions]The established quality control method for F.pandurata is simple,easy,accurate and reproducible;the preferred extraction process is stable and feasible,suitable for the extraction and purification of coumarin effective parts in F.pandurata roots,so it is expected to provide references for further development of F.pandurata. 展开更多
关键词 Ficus pandurata Hance Quality control extraction process Orthogonal experiment Multi-indicator scoring method
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